Pivot for windows and the like



Feb 9, 1932 w. F. CRITTALL ETAL 1,844,562

PIVOT FOR WINDOWS AND THE LIKE Filed March 19, 1950 M qm- Patented Feb. 9, 1932 UNVIED STTS PATENT ,FC

WALTER FRANCIS CRITTALL lrNI) JOSEPH BLAIR WARDROPPER, 0F BRAINTREE, EN`G- LAND, .ASSIGNORS TO THE CRITTALL MANUFACTURING COMPANY, LIMITED, F

ESSEX, ENGLAND PIVOT FOR WINDOWS .AND LIKE Application led March 19, 1930, Serial No. 437,152, and in Great Britain August 27, 1929.

This invention relates to an improved pivot for windows and the like, and more partienlarly :for easement and like pivoted windows.

According to the present invention a pivot comprises a pair of discs adapted to be secured to the moving and fixed parts of the window respectively, and a sleeve encircling said discs and forming a journal therefor.

If desired, the sleeve may be split and provided with means adapted to draw the ends of the sleeve together, whereby the friction between the sleeve and the discs may be varied and the hinge locked in any desired position.

The invention is illustrated in the accompanying drawings in which Figure 1 is a side elevation of a pivot constructed according to the invention, and Figures 2 and 3 end elevations of Figure 1, showing the window, to which the hinge is applied, in its closed and open positions respectively. Figures 4 and 5 are detail views of component parts of the pivot, Figure 4 being a section of one of the discs, and Figure 5 an elevation of the locking sleeve. Figures 6, 7 and 8, 9 are respec tively elevations at right angles to one an other of a modified form of locking device with the window in open and closed positions Figures and 11 are detail views of the locking pin shown in Figures 6-9, and Figures 12 and 13 detail views of the cam for effecting the locking of the pivot. Figure 14 a cross section on the line XIVHXIV, Fig- 'are 2, showing the sections of which the fixed and moving parts of the window are formeel.

The invention is shown in the drawings as applied to a window frame whose fiXed part is formed of steel section having a web 1, flanges 2, 3 and 4, and a short flange 5, while the moving part of the window is formed ol steel sections having a web 6, flanges 7, 8 and a short flange 9; it will be understood that the flanges 2, 5, 8 and 9 are located on opposite sides of the webs on opposite .sides of' the pivot.

rlhe flanges 2, 5 and 8, 9 of the sections are cut away to receive a sleeve 10 which encircles a pair of `discs 11, 12 secured respectively to the webs of the hired and moving parts ofthe window by rivets 13, 14, the discs being ol greater diameter than the width of the section and being hollowed out as seen in Figure 4.

The inner diameter of the sleeve 10 is normally such that the discs 11, 12 are an easy lit within it, and its length equal to that of the combined thickness ol the two discs. The sleeve is formed with an external radially projecting block, and the sleeve and blocl; are slit radially, the block thus being formed with two lugs 15, 16. One of the lugs 16 is screw-threaded to receive a screw 17 which passes freely through the other lug 15, and through one of the flanges 2 of the window section, the screw terminating in a lnurled head 18 whereby the sleeve can be contracted on to or released from frictional engagement with the discs to loclr or release the window.

In the modification shown in Fignres 6-9, the screw 17 is replaced by a pin 19 which passes through clearance holes in the lugs 15, 16 and is provided at one end with a flange having a projection 20 in engagement with a steel plate 21 having a recess 22 and bearing against one of lthe lugs 16, the other end of the pin 19 being provided with an operating hand lever 23.

In this arrangement the window can be locked in position by turning the pin 19 by means of the hand lever 23, so that the proj ection moves from the recess 22 to the unrecessed portion oi the plate, thus contracting the sleeve on to the discs.

What we claim isz- 1. In a pivot hinge, the combination of a pair of discs and a sleeve encircling said discs.

2. In a pivot hinge, the combination of a pair of discs, a split sleeve encircling said discs, and means for contracting the split sleeve on to the discs.

3. In combination with a fixed frame member, means for pivoting a movable frame member therein comprising a pair of discs, secured respectively to said fixed and 1novable frame members, and a sleeve encircling said discs.

4. In combination with a fixed frame member, means for pivoting a movable frame member therein comprising a pair of discs secured respectively to said fixed and movable frame members, a split sleeve encircling said discs, and means for contracting said split sleeve on to said discs, said means passing through one of the frame members so as to anchor the split sleeve thereto.

5. In combination With a fixed frame member, means for pivoting a movable frame member therein comprising a pair of discs carried respectively by said fixed and movable frame members, a deformable split sleeve separate from and encircling both of said discs, and manually operable means to deform said sleeve to clamp it upon both of y said discs.

In testimony that We claim the foregoing as our invention, We have signed our names this 21st day of February, 1930.

VALTER FRANCIS CRITTALL. JOSEPH BLAIR WARDROPPER. 

